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Preparation method and application of graphdiyne in-situ grown metal organic framework material

A metal-organic framework, in-situ growth technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of high cost and low reserves of precious metal catalysts, and achieve catalytic activity and stability. Improve and solve the effect of high cost

Active Publication Date: 2021-01-26
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Another object of the present invention is to provide a method for preparing the above-mentioned graphyne in-situ growth metal-organic framework material, the preparation method is simple to operate, and solves the problems of high cost and low reserves of noble metal catalysts in the prior art;

Method used

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  • Preparation method and application of graphdiyne in-situ grown metal organic framework material
  • Preparation method and application of graphdiyne in-situ grown metal organic framework material
  • Preparation method and application of graphdiyne in-situ grown metal organic framework material

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Embodiment 1

[0028] (1) Graphyne and Fe(NO 3 ) 3 9H 2 O was sonicated in ethanol until uniformly dispersed, and graphyne adsorbing metal salts was obtained by rotary evaporation drying technology; the ultrasonic power was 220W, and the ultrasonic time was 20min.

[0029] (2) NH with a mass ratio of 3:1 to graphyne 2 -H 2 BDC and the product of step (1) were reacted in a reaction kettle at 120 °C for 72 h under the condition of dimethylformamide solvent, cooled, and washed to obtain a metal-organic framework material grown on graphyne in situ;

[0030] (3) Under a nitrogen atmosphere, the temperature was raised to 900°C at a heating rate of 5°C / min and kept for 3h, then cooled, and pickled with 2M HCl solution at 90°C for 24h to obtain a graphyne in situ growth metal organic framework material.

Embodiment 2

[0032] (1) Graphyne and Fe(NO 3 ) 3 9H 2 O was sonicated in ethanol until uniformly dispersed, and graphyne adsorbing metal salts was obtained by rotary evaporation drying technology; the ultrasonic power was 280W, and the ultrasonic time was 10min.

[0033] (2) NH with a mass ratio of 2:1 to graphyne 2 -H 2 BDC and the product of step (1) were reacted in a reaction kettle at 125°C for 70 h under the condition of dimethylformamide solvent, cooled down, and washed to obtain a metal-organic framework material grown on graphyne in situ;

[0034] (3) Under a nitrogen atmosphere, the temperature was raised to 950 °C at a heating rate of 5 °C / min and kept for 2.5 h, then cooled, and pickled with 2.5 M HCl solution at 95 °C for 22 h to obtain a graphyne in situ growth metal organic framework material .

Embodiment 3

[0036] (1) Graphyne and Fe(NO 3 ) 2 9H 2 O was sonicated in ethanol until uniformly dispersed, and graphyne adsorbing metal salts was obtained by rotary evaporation drying technology; the ultrasonic power was 260W, and the ultrasonic time was 15min.

[0037] (2) NH with a mass ratio of 4:1 to graphyne 2 -H 2 BDC and the product of step (1) were reacted in a reaction kettle at 115°C for 75 h under the condition of dimethylformamide solvent, cooled and washed to obtain a metal organic framework material grown on graphyne in situ;

[0038] (3) Under a nitrogen atmosphere, the temperature was raised to 850 °C at a heating rate of 5 °C / min and kept for 3.5 h, then cooled, and pickled with 2M HCl solution at 85 °C for 26 h to obtain a graphyne in situ growth metal organic framework material .

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Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a preparation method and application of a graphdiyne in-situ grown metal organic framework material. The preparation method comprises the following steps: evenly dispersing graphdiyne in ethyl alcohol, adding transition metal salt for dissolution, and conducting drying to obtain graphdiyne having adsorbed metalsalt; carrying out a hydrothermal reaction on organic ligand and the graphdiyne having adsorbed metal salt to obtain a metal organic framework material growing on graphdiyne in situ; and carrying outa pyrolysis reaction to obtain the graphdiyne in-situ grown metal organic framework material. According to the invention, graphdiyne and a metal organic framework material are combined through an in-situ growth technology, a non-noble metal-based oxygen reduction electrocatalytic material with high half-wave potential under an alkaline condition is prepared, and the problems that a noble metal catalyst is high in cost and low in reserves in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method and application of graphyne in-situ growth metal-organic framework materials. Background technique [0002] With the growth of energy demand and the intensification of environmental pollution, the development of energy conversion devices such as metal-air batteries and proton exchange membrane fuel cells is an important way to solve current energy problems and achieve green and sustainable development. As a key material for fuel cells, electrocatalytic materials must satisfy the following characteristics: excellent catalytic performance, electrochemical stability, and electrical conductivity. However, due to the slow kinetics of its cathodic oxygen reduction reaction (ORR), currently only Pt-based noble metal catalysts with low reserves and high price are used as commercial catalysts, which lead to scarcity of resources, high cost and poor durab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J37/08H01M4/90
CPCB01J27/24B01J37/086H01M4/90B01J35/33Y02E60/50
Inventor 王帅陈晓磊李平胡婷婷鱼在洋
Owner QILU UNIV OF TECH
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